Why is the Change interface not included in Filesystem?

[progrium]

I would expect it to be. I don't see it referenced anywhere in there.

[mcuadros]

The goal is keep the FileSystem interface small as posible, to avoid large interfaces with complex implementations.

Change interface is there with the goal of allow to the users have optional methods, with explicit usage of this methods. If we simple add this methods to the FileSystem interface and those are not implemented, makes hard to the user identify if is supported or not.